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Experimental Study and Finite Element Polycrystal Model Simulation of the Cold Rolling Textures in a Powder Metallurgy Processed Pure Aluminum Plate

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Journal of Materials Science & Technology 2005年第2期21卷 148-154页

作者： liqingchen NaoyukiKanetake InstituteofMetalResearch ChineseAcademyofSciencesShenyang110016China//DepartmentofMaterialsProcessingEngineeringSchoolofEngineeringNagoyaUniversityFuro-choChikusa-kuNagoya464-8603Japan DepartmentofMaterialsProcessingEngineering SchoolofEngineeringNagoyaUniversityFuro-choChikusa-kuNagoya464-8603Japan

Ingot metallurgy (IM) aluminum has long been the subject and attracted the attention of many metallurgists and textural researchers of materials. Due to the introduction of large amounts of ex situ interfaces, however, the textures in powder metallurgy (PM) processed aluminum has been rarely reported. In this article, a pure aluminum plate was prepared via PM route. The starting billet was first produced with uni-axially cold compaction and flat hot-extrusion and then followed by cold rolling processes. The hot-extruded and cold rolling deformation textures of the pure PM aluminum at 50%, 80% and 90% cold rolling reductions were studied by orientation distribution functions (ODFs) analysis. The finite element polycrystal model (FEPM) was finally utilized to simulate the cold rolling textural evolution at various stages of cold rolling. In FEPM simulation, the initial hot-extruded textures were taken into account as inputs. The results showed that typical β-fiber texture formed in pure PM aluminum with the cold rolling reduction increased till 80%, and there was not much change after excessive cold rolling deformation. Homogeneous slip is not the only deformation mode in PM processed pure aluminum plate at over 80% cold rolling reduction. The experimental results were qualitatively in good agreement with the simulated ones.

关键词： Texture Cold rolling Aluminium Finite element polycrystal model (FEPM) Powder metallurgy

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